Brush pen



FIG. 1 is an enlarged perspective view of a brush pen showing our design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a cross-sectional view thereof taken along lines 8-8 shown in FIG. 4;

FIG. 9 is a perspective view of the brush pen body thereof shown without the cap, for convenience; and,

FIG. 10 is a right side elevation view of a cap of the brush pen.

The portions of the brush pen shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a brush pen, as shown and described. 